There are three ways of adding a socket outlet to a ring circuit. Using a masonry bit and hammer action drill, make a series of holes within the outline to a slightly greater depth than that of the mounting box. Hold the box in place, use a spirit level to ensure it’s horizontal, and then draw around it in pencil. Reply. If the insulation is heat damaged, cut back the cores and strip the ends. Cut outwards from the holes, following the box outline, and remove the waste piece of plasterboard. Isolate the circuit you plan to work on by removing the circuit fuse. Cut the cable and do the same at the existing socket. Tighten the terminal screws fully. Reaction score 6,436. If you’re in any doubt about whether the socket from which you plan to run is part of a ring circuit, you’ll need to consult a qualified electrician. Connecting all the wires leaves you with one loose wire. Remove the existing socket or switch from the wall (if replacing). Securely mount the box in the required position. A telephone cable runs from the Junction Box to to the Master Socket. Only one socket outlet can be connected to a spur. (This can be a single or double outlet). An intelligent multi-socket adapter has one main and several supporting sockets. Then connect the cores of the spur cable to the matching terminal – live to live, neutral to neutral, and earth to earth. Brush out all the debris and check the fit of the box. Don’t forget to add green / yellow sleeving to the bare earth core of the new cable, and make sure the terminal screws are tight. Be sure which type of junction box should be used for ring main, radial circuits and lighting circuits. The electrical box, or junction box, is a code requirement that was established to prevent fires and other electrical accidents. I just can't find a box. The IEE Wiring Regulations are very specific about this. The terminal layout may vary from one socket or switch to another, therefore carefully check the location of the terminal connections before wiring. Put this in your pocket to avoid losing it. Used Jelly connections to link a pair from that cable to the two wires coming in from drop wire At master socket end connected that pair to A + B in master socket. Reactions: 4 people. A socket can become damaged for a number of reasons: a blow can break the faceplate or overheating may cause scorching. Keep the screws in case the new ones don’t fit. Connect the wires and fit the faceplate. This box belongs to BT but should have a cover over it - legally you aren't allowed to mess with it. Start off with a standard junction box in white and black available in 5A to 30A in combination with 3 to 6 terminals. But as the same regulations apply, make sure you ask a qualified electrician if you’re in any doubt. Remove the knockout in the new surface mounting box and pass the cables through. And the new socket mustn’t extend the floor area served by the circuit beyond 100 square metres. What you need to find is a socket with two cables entering it. If for some reason you need a large number of spurs, it is time to replace the whole circuit rather than keep adding to it. Reactions: sparkie141, mattg4321, DPG and 4 others. See our Cable Stripping Guide for … It's annoying if a socket or appliance doesn't work. If in any doubt, or where required by the law, consult a competent person who’s registered with an electrical self-certification scheme. If the tester shows continuity, this is a ring circuit and you can add a spur – provided it won’t extend the floor area of the circuit beyond 100 square metres. Connect the red core or cores to the live terminal of the new faceplate, the black to the neutral terminal and the earth to the earth terminal. Alternatively, the ring can be extended. Explanation of above picture. Although you can increase the number of sockets in a room by converting single sockets to doubles, there may be times where you need an extra socket where none exist already. Looking at the terminations on the socket, there are normally 6 (numbered 1 to 6) terminals in the socket or junction box, the wiring colour code is: There's no need to know what each wire does, just to know that the wiring is always the same colour to the same colour w… The junction box should be wired as shown below. I have no use for extensions to other parts of the house. Finally, check your new socket is correctly wired by using a socket tester. Reply. In this case, you’ll need to add a spur from a ring circuit. Isolate the circuit at the consumer unit and use a socket tester to double check that the power is off. The secondary sockets switch back on as soon as you switch on the master appliance. Unscrew the faceplate of the new socket, feed the cable into the mounting box through a rubber grommet and connect its cores to the faceplate terminals. malcolmsanford-Arms. Each socket outlet or junction box on the ring can only have one spur connected. WARNING - When fixing the cable, take care not to puncture or damage it … At the other end, attach electrical tape to a 1/0 wire strand and attach it to the fishtape. Sockets can be surface or flush mounted. Run a fishtape through the conduit, from one junction box to the other. Find junction boxes for a variety of amperages and terminals to suit the purpose, and screwless push in connectors. Remember to add green / yellow sleeving to the bare earth cores. Next, screw the base of the junction box to the side of an adjacent joist, or to a batten nailed between joists. This is similar to the previous method, but instead of connecting to a socket, a junction box is connected into the ring and the spur cable attached there. When flush mounting a box in a solid wall, you need to cut a neat recess through the plaster and into the masonry behind. Author. Details shown below in new and old colours.Note that junction boxes do not generally have labelled terminals, so you do not have to use the exact arrangement here. There are special socket conversion boxes available for doing this, or you can use a standard double socket and drill and plug the wall, as shown here. These cables have permanent live, neutral and earth wires. The fact that one terminal is spaced further apart than the others has no electrical relevance - it is simply to allow space for the cover fixing screw. Before you start any type of electrical work, follow these safety precautions: If the socket is flush mounted, it’s very easy to replace it with a surface-mounted double socket. Permalink. Make sure the terminal screws are tight, then replace the cover of the box and turn on the power. Once you’ve found out the extent of the circuit, you can measure the rooms it supplies and calculate the floor area. This has a flange that sits against the face of a wall and spring-loaded or rotating lugs that press against the back of the plasterboard, giving more flexibility when you’re positioning the fitting. Spend your effort on making sure the circuit is extended correctly, cables clipped where necessary and all cables properly terminated and connections tightened. Advice on wiring electrical junction box with easy to follow junction box wiring diagrams, including information on 20 and 30 amp junction boxes. fig 1. Run a length of appropriate cable from here into the new socket box ensuring that you allow enough cable for making the connections there and at the junction box.
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